CVE-2026-1925 in EmailKit Plugin
Summary
by MITRE • 02/18/2026
The EmailKit – Email Customizer for WooCommerce & WP plugin for WordPress is vulnerable to unauthorized data modification due to a missing capability check on the 'update_template_data' function in all versions up to, and including, 1.6.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify the title of any post on the site, including posts, pages, and custom post types.
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Analysis
by VulDB Data Team • 02/18/2026
The vulnerability identified as CVE-2026-1925 affects the EmailKit plugin for WordPress, specifically targeting the email customizer functionality integrated with WooCommerce and WordPress. This security flaw resides within the plugin's capability validation mechanisms, creating a path for unauthorized data modification that extends beyond normal user permissions. The issue manifests in versions up to and including 1.6.2, indicating a widespread exposure across multiple iterations of the plugin's codebase. The vulnerability's severity is amplified by the fact that it requires only Subscriber-level access or higher to exploit, making it particularly dangerous in environments where user access control is not strictly enforced. The affected plugin serves as an email customization tool that allows administrators to modify email templates used for various WooCommerce transactions, making it a valuable target for attackers seeking to manipulate communication flows within e-commerce operations.
The technical flaw stems from a critical missing capability check within the 'update_template_data' function, which should have validated user permissions before allowing data modification operations. This missing validation creates a privilege escalation path where authenticated users can bypass normal access controls and perform unauthorized modifications to content across the WordPress site. The vulnerability specifically allows attackers to modify post titles for any post type including standard posts, pages, and custom post types, effectively undermining the integrity of the content management system. The absence of proper capability verification means that the plugin fails to distinguish between legitimate administrative operations and malicious attempts to alter content, creating a direct pathway for data manipulation. This flaw represents a classic example of insufficient authorization checks that violates fundamental security principles of least privilege and access control enforcement.
The operational impact of this vulnerability extends beyond simple content modification, potentially enabling attackers to disrupt business operations, manipulate customer communications, or create confusion within the e-commerce platform. An attacker with Subscriber-level access could modify critical post titles to include misleading information, alter product descriptions, or manipulate order confirmation messages that could affect customer trust and platform integrity. The vulnerability's scope encompasses all post types, meaning that attackers could potentially compromise not only product information but also static pages, blog posts, and custom content types that might be critical to business operations. This capability could be leveraged to create social engineering attacks, manipulate search engine results, or disrupt the normal flow of customer interactions within the WooCommerce environment. The impact is particularly severe in multi-user environments where the plugin might be used to manage email communications for various business functions.
Mitigation strategies for CVE-2026-1925 should prioritize immediate plugin updates to versions that address the missing capability check, as this represents the most direct solution to the vulnerability. System administrators should implement strict user access controls and regularly audit user permissions to minimize the risk of unauthorized access to the affected plugin functionality. The implementation of additional security measures such as web application firewalls, regular security scanning, and monitoring of unusual content modification activities can provide layered protection against exploitation attempts. Organizations should also consider implementing principle of least privilege policies, ensuring that users only have access to functionality necessary for their specific roles within the WordPress environment. Regular security assessments of plugins and themes should be conducted to identify similar capability validation issues that might exist in other components of the WordPress ecosystem. This vulnerability aligns with CWE-284, which addresses improper access control, and represents a clear violation of ATT&CK technique T1078 for valid accounts, as it allows attackers to leverage existing user credentials to perform unauthorized operations within the system.